JKSSB Junior Assistant 2026 Paper

Explanation

Step 1: Determine the total work and individual efficiencies

Find the Least Common Multiple (LCM) of the time taken by A, B, and C:

• Time: A = 10 days, B = 12 days, C = 15 days.

• Total Work (LCM of 10, 12, 15): 60 units.

Now, calculate how many units each person completes per day (Efficiency):

• Efficiency of A ($E_A$): $60 / 10 = \mathbf{6\text{ units/day}}$

• Efficiency of B ($E_B$): $60 / 12 = \mathbf{5\text{ units/day}}$

• Efficiency of C ($E_C$): $60 / 15 = \mathbf{4\text{ units/day}}$

Step 2: Calculate work done in phases

Phase 1: First 2 days (A, B, and C work together)

• Combined Efficiency: $6 + 5 + 4 = 15\text{ units/day}$.

• Work done in 2 days: $15 \times 2 = \mathbf{30\text{ units}}$.

Phase 2: Next 2 days (A has left, only B and C work)

• Combined Efficiency (B + C): $5 + 4 = 9\text{ units/day}$.

• Work done in 2 days: $9 \times 2 = \mathbf{18\text{ units}}$.

Total work completed so far:

• $30\text{ units} + 18\text{ units} = \mathbf{48\text{ units}}$.

Step 3: Calculate the remaining work and time

• Remaining Work: $60\text{ units} - 48\text{ units} = \mathbf{12\text{ units}}$.

• After the 4th day, C also leaves, leaving only B to finish the work.

Time taken by B to finish the remaining work:

$$\text{Time} = \frac{\text{Remaining Work}}{\text{Efficiency of B}} = \frac{12}{5} = \mathbf{2.4\text{ days}}$$

Answer:

The remaining work will be completed in 2.4 more days.

(The total time for the entire project would be $2 + 2 + 2.4 = 6.4\text{ days}$).

Explanation

The correct answer is A) The results will be announced by the committee tomorrow.

To convert a sentence from Active to Passive voice in the Future Simple tense, you must follow these structural changes:

1. Object becomes Subject: "The results" moves to the beginning.

2. Verb Transformation: The active form (will + verb) becomes will + be + past participle (V3).

   • Announce becomes will be announced.

3. Subject becomes Agent: "The committee" is moved to the end, usually preceded by the preposition "by."

4. Time Expression: "Tomorrow" remains at the end to provide context.

Explanation

The correct option to complete the sentence is in.

Full Sentence: She is proficient in French and German.

Explanation

The error is in part (B) has submitted.

Grammatical Explanation

This is a Subject-Verb Agreement error.

• The Subject: "The students" is a plural noun.

• The Rule: In the present perfect tense, plural subjects must be paired with the auxiliary verb "have," while singular subjects (he, she, it) use "has."

• The Correction: The sentence should read: "The students have submitted their assignments before the deadline."

Explanation

To form a coherent paragraph:

• Start with the goal/intent → III (She wanted to become a professional dancer)

• Then show effort → I (She practiced every day)

• Follow with effect of effort → IV (Her dedication impressed her teachers)

• End with final result → II (She won the competition)

Correct Order:

III → I → IV → II

Explanation

To form a logical paragraph:

• Start with background/introduction → IV (determination from a young age)

• Then mention difficulty → II (success did not come easily)

• Follow with effort → I (he worked hard)

• End with result → III (efforts paid off)

Correct Order:

IV → II → I → III

Explanation

The correct conversion into indirect speech is: The Professor said that he would review my thesis the next day.

Explanation

• Analysis of Option C: The use of "must have" indicates a near-certain conclusion based on evidence about something that happened in the past. If the experiment failed or the results are wrong, the logical deduction is: "They must have overlooked the data."

Explanation

The correct answer is:

B) He was appointed the head of department after an extensive review process.

Explanation

Option D: “After the report was revised, it was criticized by the editor.”
Here, “it” clearly refers to “the report”. Even though “revised” is mentioned, the noun hasn’t changed—there’s only one logical referent, so it’s considered unambiguous in standard grammar tests.